If all go well i would like let more space from use bsd solutions but unfortunately i have space especially on extended partition.
So the question is simple, there is any hope in the future for an eventual possibility in that directions?
Or the only solutions is wait solution as EFI (actually available only on Intel/mac) so it's possible overcome the limit of the few primary partition available for a single disk indipendently by his capacity?

I initially ran freebsd as such:
/, var filesystems (2) in a disk partition (one of 4)
/tmp, /usr filesystems (2) in an extended partition (amidst
the dos drive letters...)
More-than-slight instability, but it may have been due to the 5.x
version of BSD rather than the extended partition. Or not.